Roof Estimating Formulas

To get the slope of your roof based on degrees roof rise or x inches per 12 run use our roof pitch calculator.

Roof estimating formulas.

However if you use premium materials such as metal wood shingles clay tile etc the cost of your roof will be at least 9 500 16 000. 1 roof square 100 square feet. Use the following formula which also describes a right triangle. The length l times the height h of a triangle is twice its area a2.

The average roof replacement cost is 4 200 6 600 on a 1 600 sq ft. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. Medium low slope roof pitch of 3 or 4. It is often compared to slope but is not exactly the same.

You can also calculate roof pitch even without using a roof slope calculator. L 30 feet h 12 feet 30 12 2 180 square feet. Medium steep slope roof pitch of 9. A roof s pitch is determined by how much it rises vertically for every foot it runs horizontally.

Medium slope roof pitch of 6. Here are the equations you may use to solve for the length of the slope and the rafter. Thus a moderate 6 in 12 roof pitch means that the roof rises 6 inches vertically for every 12 horizontal inches it runs. Steep slope roof pitch of 12 or 45 degrees.

Roofing cost can vary widely depending on the size and complexity of your roof type of materials you use as well as your location. Otherwise use the table or diagram below. Ranch house using asphalt roof shingles. Roof pitch roof pitch is the measurement of a roof s vertical rise divided by its horizontal run.